Network and Virtualization Quiz

In a hybrid topology combining star and ring, what risk arises if the central switch in the star fails?

• Only the ring portion fails

• The entire hybrid network collapses

• The star devices continue independently

• The ring network reroutes via TCP/IP

Which of the following best illustrates a breakdown in communication protocol layering?

• IP packets arrive out of order

• Application layer bypasses transport layer

• Session timeout occurs

• MAC address filtering fails

What condition must be true for full-duplex transmission to outperform half-duplex in latency-sensitive systems?

• Equal bandwidth in both directions

• Independent media paths

• Packet buffering

• Low signal-to-noise ratio

Nested virtualization is most useful when:

• Hypervisors need GPU access

• VMs host other hypervisors for testing

• Static resource allocation is needed

• Minimizing application compatibility

Why does network interface virtualization pose higher security risks?

• It uses read-only channels

• It exposes traffic to multiple layers

• It disables routing tables

• It’s incompatible with firewalls

A VM escape attack targets:

• BIOS

• Guest OS interface

• Shared memory to access host

• Antivirus tools

Frequent TCP retransmissions despite a reliable connection indicate issues at the:

• Application layer

• Transport layer

• Data link layer

• Physical layer

An API gateway in a containerized system becomes vulnerable when:

• URI paths are short

• Reverse proxy chaining occurs

• It relies on JSON

• No DNS caching exists

Which violates protocol standardization?

• Changing TTL

• FTP commands sent via HTTP format

• DNS fallback

• VLAN tagging

JSON is preferred over XML in cloud systems because:

• It is typed

• It parses faster with less overhead

• It includes schemas

• It offers stronger security